X0306 4 2018-02-21 false 0001489393 LyondellBasell Industries N.V. LYB 0001500293 Patel Bhavesh V. 4TH FLOOR ONE VINE STREET LONDON X0 W1J 0AH UNITED KINGDOM false true false false Chief Executive Officer Class A Ordinary Shares 2018-02-21 4 F false 18048.00 109.09 D 139640.00 D Class A Ordinary Shares 2018-02-21 4 A false 27071.00 0.00 A 166711.00 D Class A Ordinary Shares 2018-02-21 4 A false 45864.00 109.09 A 212575.00 D Class A ordinary shares 61810.00 I By Family Trust Stock Options (Right to Buy) 109.09 2018-02-21 4 A false 136656.00 0.00 A 2028-02-21 Class A Ordinary Shares 136656.00 136656.00 D Represents shares required to satisfy tax withholding obligations in connection with the vesting of 45,864 shares of performance-based stock granted to the Reporting Person on February 17, 2015. Includes 130,756 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan: 23,638 granted on January 12, 2015 that vest on January 12, 2019; 23,637 granted on January 12, 2015 that vest on January 12, 2020; 26,066 granted on February 16, 2016 that vest on February 16, 2019 and 30,344 granted on February 16, 2017 that vest on February 16, 2020. The 27,071 RSUs reported on this Form 4 vest on February 21, 2021. Represents shares earned in connection with the performance-based stock previously granted and unreportable on February 17, 2015 pursuant to the issuer's long-term incentive plan. Shares were earned based upon the level of attainment of certain performance objectives and continued employment. These shares fully vested on February 21, 2018 following certification by the Issuer's compensation committee. Granted pursuant to the issuer's long-term incentive plan. Award vests in three equal installments on the 1st, 2nd and 3rd anniversaries of the date of grant of February 21, 2018. /s/ Lara A. Mason, Attorney-in-Fact 2018-02-23